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A laser capable of outputting single longitudinal mode laser beam and its light output control method

A laser and laser beam technology, applied in the field of lasers, can solve the problems of high cost of gratings, high energy and easy damage, etc., and achieve the effects of high damage resistance threshold, space saving, and wide free spectrum.

Active Publication Date: 2020-01-07
JILIN PROVINCE KING LASER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The realization of this technology usually requires multiple Bragg gratings, but the gratings are expensive and easily damaged by large energy, which is the bottleneck of this technology

Method used

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  • A laser capable of outputting single longitudinal mode laser beam and its light output control method
  • A laser capable of outputting single longitudinal mode laser beam and its light output control method
  • A laser capable of outputting single longitudinal mode laser beam and its light output control method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] figure 1 One of the Q-switching components shown in 3 can be image 3 The passive Q-switching crystal 301 shown in , the passive Q-switching crystal 301 is preferably a saturable absorber Cr:YAG (a saturable absorber is also called a saturable absorber, and a saturable absorber (saturated absorber) is a laser cavity Q-switching technology. A switch crystal material used. The absorption coefficient of the saturated absorber to the low light decreases with the increase of the incident light intensity, and when it reaches the saturation value, it is transparent to the laser, and the loss in the laser cavity is reduced by using its saturated absorption characteristic. (Q value) is modulated, and a pulse is emitted, and the generated pulse width is on the order of several nanoseconds or even tens of picoseconds.), and its initial transmittance T=4%-80%. The laser structure formed by the passive Q-switching crystal 301 includes a 1064nm total reflection mirror 1, an aperture...

specific Embodiment approach 2

[0087] figure 1The Q-switching component 3 can also be Figure 4 Shown in the photoelectric Q switch 302 assembly with optical feedback control circuit 303, the laser structure formed by the photoelectric Q switch 302 assembly with optical feedback control circuit 303 includes 1064nm total reflection mirror 1, small Aperture diaphragm 2, photoelectric Q switch 302 assembly, optical feedback control circuit 303, polarizer 4, first quarter-wave plate 5, laser gain medium 6, pump source 7, second quarter-wave plate 8 1. Output mode selection component 9, wherein the output mode selection component 9 is any one of the mode selection components as shown in Fig. 2a-2c.

[0088] Among them, the photoelectric Q switch 302 component can be a pressurized photoelectric Q switch with an optical feedback control circuit 303 or a depressurization photoelectric Q switch with an optical feedback control circuit 303. The pressurized photoelectric Q switch has the following two combinations T...

Embodiment 3

[0092] This embodiment also discloses a light emission control method of the laser capable of outputting a single longitudinal mode laser beam, which specifically includes the following steps:

[0093] S1. The timing control trigger circuit 3034 outputs the trigger signal signal-1 to the pumping source 7. The pumping source 7 starts pumping after receiving the signal-1 signal. The duration of one pumping cycle is T, where 70μs≤T≤ 300μs;

[0094] S2, while the timing control trigger circuit 3034 outputs signal-1, the delay circuit outputs a synchronous trigger signal signal-2 whose delay is T1, and the synchronous trigger signal signal-2 is sent to the pre-laser circuit in the Q drive to start the pre-laser circuit. Laser process, wherein, the pre-laser start time is t1, the end time is t2, the pre-laser duration is T2=t2-t1, wherein, 5uS≤T2≤230uS, the pre-laser establishment process is:

[0095] S201, the vertical oscillating S light reflected by the polarizer 4 is converted ...

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Abstract

The invention discloses a laser capable of outputting a single longitudinal mode laser beam, and a light output control method thereof, having strong anti-interference ability and high energy output stability of the system and without affecting the single longitudinal mode effect by the aging of the pump xenon lamp. The laser is sequentially provided with a total reflection mirror, a small aperture diaphragm, a Q-switching component, a polarizing plate, a first quarter-wave wave plate, a laser gain medium, a second quarter-wave plate, and an output mode selection component along the laser transmission direction; and the Q-switching component is any of a passive Q-switching crystal, a pressurized photoelectric Q-switch with an optical feedback control circuit, and a de-voltage photoelectricQ-switch with an optical feedback control circuit. In the invention, the single longitudinal mode laser energy output by the xenon lamp pump laser is nearly 100 times higher than that of the semiconductor pump, the energy amplification is easier with a strong technical advantage; the selected mode output component may be used to drastically reduce the number of longitudinal modes in the resonantcavity, and the number of longitudinal modes falling within the fluorescence line of the gain medium is less, thereby facilitating the formation of a single longitudinal mode.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a laser capable of outputting a single longitudinal mode laser beam and a light output control method thereof. Background technique [0002] In many scientific research applications and medical applications, such as SBS pulse compression and biospectral analysis, single longitudinal mode lasers are required. In the past, the output energy of the short-cavity single longitudinal mode seed source of the semiconductor end pump was often too small, generally tens of uJ to hundreds of uJ, and multi-stage amplification was required to meet the requirements; For a series of problems such as line width increase and mode misalignment, it is very meaningful to develop high-quality and high-energy single longitudinal mode lasers. [0003] The pumping source is xenon lamp pumping. The peak power of the xenon lamp pumping source is much higher than that of semiconductor pumping. It has the ir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/0915H01S3/115H01S3/127
CPCH01S3/0915H01S3/115H01S3/127
Inventor 邵建华吴成顺李大钢王雪娇王俊敏刘海霞赵雪
Owner JILIN PROVINCE KING LASER CO LTD
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